Hinata Kurodo is searching for his sister, who "once existed" but who disappeared, and now no one else remembers her. Kurodo receives a letter from a transfer student, a beautiful girl named Shimotsuki Shirai...

Yuuma is summoned back to his home island after the death of his mother and asked to become the next head of the wealthy Nuenaki family. He has certain misgivings though and rejects the offer. However after the...